We just replaced the whole system in our toilet. It use to have a flushing ball valve and it worked great until it broke. It flushed everything down the first time no problem. Now with the new flushing system it's having a hard time just flushing down the TP. Did I not install it properly? I set it to the highest water fill line possible and made sure the chain is holding up the flapper long enough. Do I need a better system? If so what's the best flushing system to get?

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I replaced the systems in all 3 toilets of my current house when I moved in, and I have had endless minor problems with them since. "They don't make 'em like they used to". I get double flushes about have the time and keep tweaking the flapper settings. I am about to start replacing them again with high-end adjustable flush systems. Anyway, the height of the refill tube, and the height of the water is key to a good flush. Regardless of how much water you use per flush, you want the water to be as high as possible when you flush. Some systems have shorter refill tubes than others. And you want the water to come within about an inch of the top of the tube, but not higher than the water line from the valve, or it will siphon water continually.